Forward and Views with Path arguments: Forward 'path' is broken

When using Forward with views that allow Path arguments, the '%' character in Forward's path does not get resolved to the actual argument, thus breaking forwarding. For example, a Page view with Path set to 'topics/%' takes a parameter Foo, but the page /topics/Foo will have its Forward link point to /forward?path=topics/%

I fixed it with the attached patch, but was wondering what was the reason for not using $path = $_GET['q']; in forward_help() in the first place?